Question

If 1 mole of a diatomic gas present in $10L$ vessel at certain temperature exert a pressure of $0.96atm$. Under similar conditions, an ideal gas exerted $1.0atm$ pressure. If the volume of the gas molecule is negligible. Then, the value of Van der Waals' constant $"a"$ is _____ $atm{L}^2/mo{l}^2$.

Answer 1

If volume of gas molecule is negligible, then gas equation is $P_{ideal}=P_{real}+\frac{a\times n^2}{V^2}$,

Here $V$ is 10 and $n$ is 1.

So, $1=0.96+\frac{a}{100}$

$a=4$.